Cathodic Protection System (Sacrificial Anode)

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Transcript of Cathodic Protection System (Sacrificial Anode)

************************************************************************** USACE / NAVFAC / AFCESA / NASA UFGS-26 42 14.00 10 (November 2006) ----------------------------------Preparing Activity: USACE Superseding UFGS-26 42 14 00 10 (April 2006) UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated January 2009 ************************************************************************** SECTION TABLE OF CONTENTS DIVISION 26 - ELECTRICAL SECTION 26 42 14.00 10 CATHODIC PROTECTION SYSTEM (SACRIFICIAL ANODE) 11/08 PART 1 GENERAL

1.1 REFERENCES 1.2 SYSTEM DESCRIPTION 1.2.1 Contractor's Modifications 1.2.2 Summary of Services Required 1.2.3 Tests of Components 1.2.4 Electrical Potential Measurements 1.2.5 Achievement of Criteria for Protection 1.2.6 Metallic Components and Typicals 1.2.7 Metallic Component Coating 1.3 SUBMITTALS 1.4 QUALITY ASSURANCE 1.4.1 Services of "Corrosion Expert" 1.4.2 Isolators 1.4.3 Anode and Bond Wires 1.4.4 Surge Protection 1.4.5 Nonmetallic Pipe System 1.4.5.1 Coatings 1.4.5.2 Tracer Wire 1.4.6 Drawings 1.5 DELIVERY, STORAGE, AND HANDLING 1.6 EXTRA MATERIALS PART 2 PRODUCTS

2.1 MAGNESIUM ANODES 2.1.1 Anode Composition 2.1.2 Dimensions and Weights 2.1.3 Packaged Anodes 2.1.4 Zinc Anodes 2.1.5 Connecting Wire 2.1.5.1 Wire Requirements 2.1.5.2 Anode Header Cable 2.2 MISCELLANEOUS MATERIALS 2.2.1 Electrical Wire SECTION 26 42 14.00 10 Page 1

2.2.1.1 Wire Splicing 2.2.1.2 Test Wires 2.2.1.3 Resistance Wire 2.2.2 Conduit 2.2.3 Test Boxes and Junctions Boxes 2.2.4 Joint, Patch, Seal, and Repair Coating 2.2.5 Backfill Shields 2.2.6 Epoxy Potting Compound 2.2.7 Test Stations 2.2.8 Joint and Continuity Bonds 2.2.9 Resistance Bonds 2.2.10 Stray Current Measurements 2.2.11 Electrical Isolation of Structures 2.2.11.1 Electrically Isolating Pipe Joints 2.2.11.2 Electrically Conductive Couplings 2.2.11.3 Insulating Joint Testing 2.2.12 Underground Structure Coating 2.2.12.1 Field Joints 2.2.12.2 Inspection of Pipe Coatings 2.2.13 Resistance Wire 2.2.14 Electrical Connections 2.2.15 Electrical Tape 2.2.16 Permanent Reference Electrodes 2.2.17 Casing PART 3 EXECUTION

3.1 CRITERIA OF PROTECTION 3.1.1 Iron and Steel 3.1.2 Aluminum 3.1.3 Copper Piping 3.2 TRENCHING AND BACKFILLING 3.3 INSTALLATION 3.3.1 Anode Installation 3.3.1.1 Single Anodes 3.3.1.2 Groups of Anodes 3.3.1.3 Welding Methods 3.3.2 Anode Placement - General 3.3.3 Underground Pipeline 3.3.4 Installation Details 3.3.5 Lead Wire Connections 3.3.5.1 Underground Pipeline (Metallic) 3.3.5.2 Resistance Wire Splices 3.3.6 Location of Test Stations 3.3.7 Underground Pipe Joint Bonds 3.4 ELECTRICAL ISOLATION OF STRUCTURES 3.4.1 Isolation Joints and Fittings 3.4.2 Gas Distribution Piping 3.5 TESTS AND MEASUREMENTS 3.5.1 Baseline Potentials 3.5.2 Isolation Testing 3.5.2.1 Insulation Checker 3.5.2.2 Cathodic Protection Meter 3.5.3 Anode Output 3.5.4 Reference Electrode Potential Measurements 3.5.5 Location of Measurements 3.5.5.1 Piping or Conduit 3.5.5.2 Tanks 3.5.5.3 Casing Tests SECTION 26 42 14.00 10 Page 2

3.6 3.7 3.8 3.9

3.5.5.4 Interference Testing 3.5.5.5 Holiday Test 3.5.5.6 Recording Measurements TRAINING COURSE SYSTEM TESTING SEEDING CLEANUP

-- End of Section Table of Contents --

SECTION 26 42 14.00 10

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************************************************************************** USACE / NAVFAC / AFCESA / NASA UFGS-26 42 14.00 10 (November 2006) ----------------------------------Preparing Activity: USACE Superseding UFGS-26 42 14 00 10 (April 2006) UNIFIED FACILITIES GUIDE SPECIFICATIONS References are in agreement with UMRL dated January 2009 ************************************************************************** SECTION 26 42 14.00 10 CATHODIC PROTECTION SYSTEM (SACRIFICIAL ANODE) 11/08 ************************************************************************** NOTE: This guide specification covers the requirements for a cathodic protection system utilizing continuous flow direct current from sacrificial anodes. Edit this guide specification for project specific requirements by adding, deleting, or revising text. For bracketed items, choose applicable items(s) or insert appropriate information. Remove information and requirements not required in respective project, whether or not brackets are present. Comments and suggestions on this guide specification are welcome and should be directed to the technical proponent of the specification. A listing of technical proponents, including their organization designation and telephone number, is on the Internet. Recommended changes to a UFGS should be submitted as a Criteria Change Request (CCR). ************************************************************************** PART 1 GENERAL

************************************************************************** NOTE: This specification covers a cathodic protection system for metal surfaces against corrosion by producing a continuous flow of direct current from sacrificial anodes to the metal to be protected. The anodes should be of sufficient size and quantity to protect the buried metal items for a specified number of years before replacement. The U.S. Department of Transportation has issued regulations requiring the application of cathodic protection to natural gas pipelines, liquid natural gas pipelines, petroleum pipelines, petroleum products pipelines, liquid petroleum gas pipelines, and petroleum storage facilities. Title 49 of the SECTION 26 42 14.00 10 Page 4

Code of Federal Regulations, Parts 191, 192, 193 and 195 should be consulted for applicable cathodic protection requirements for specific applications. ************************************************************************** 1.1 REFERENCES

************************************************************************** NOTE: This paragraph is used to list the publications cited in the text of the guide specification. The publications are referred to in the text by basic designation only and listed in this paragraph by organization, designation, date, and title. Use the Reference Wizard's Check Reference feature when you add a RID outside of the Section's Reference Article to automatically place the reference in the Reference Article. Also use the Reference Wizard's Check Reference feature to update the issue dates. References not used in the text will automatically be deleted from this section of the project specification when you choose to reconcile references in the publish print process. ************************************************************************** The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only. ASTM INTERNATIONAL (ASTM) ASTM B 418 (2008) Standard Specification for Cast and Wrought Galvanic Zinc Anodes (2007) Standard Specification for Magnesium Alloy Anodes for Cathodic Protection (2005) Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable

ASTM B 843

ASTM D 1248

NACE INTERNATIONAL (NACE) NACE RP0193 (2001) External Cathodic Protection of On-Grade Carbon Steel Storage Tank Bottoms (2002) Corrosion Control of Underground Storage Tank Systems by Cathodic Protection (2007) Control of External Corrosion on Underground or Submerged Metallic Piping Systems (2007) Mitigation of Alternating Current and Lightning Effects on Metallic SECTION 26 42 14.00 10 Page 5

NACE RP0285

NACE SP0169

NACE SP0177

Structures and Corrosion Control Systems NACE SP0188 (2006) Discontinuity (Holiday) Testing of New Protective Coatings on Conductive Substrates

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA) NEMA TC 2 (2003) Standard for Electrical Polyvinyl Chloride (PVC) Tubing and Conduit

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA) NFPA 70 (2007; AMD 1 2008) National Electrical Code - 2008 Edition U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA) 40 CFR 280 Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards Transportation of Hazardous Liquids by Pipeline

49 CFR 192

49 CFR 195

UNDERWRITERS LABORATORIES (UL) UL 510 (2005; Rev thru Aug 2005) Polyvinyl Chloride, Polyethylene, and Rubber Insulating Tape (2004; Rev thru Aug 2007) Standard for Metallic Outlet Boxes (2007) Standard for Electrical Rigid Metal Conduit-Steel SYSTEM DESCRIPTION

UL 514A

UL 6

1.2

Provide a complete, operating, sacrificial anode cathodic protection system in complete compliance with NFPA 70, with all applicable Federal, State, and local regulations and with the minimum requirements of this contract. In addition to the minimum requirements of these specifications, [construction of gas pipelines and associated cathodic protection systems shall be in compliance with 49 CFR 192] [and] [construction of hazardous liquid pipelines, including fuel pipelines, and associated cathodic protection systems shall be in compliance with 49 CFR 195] [and] [construction and installation of underground fuel storage tanks and associated cathodic protection system shall be in compliance with 40 CFR 280 ]. The services required include planning, installation, adjusting and testing of a cathodic protection system, using sacrificial anodes for cathodic protection of the [Water] [Fire Protection] [Force Main] [Gas] [_____] lines, their connectors and [lines under the slab or floor foundation.] The cathodic protection system shall include anodes, cables, connectors, corrosion protection test stations, and any other equipment required for a complete operating system providing the NACE criteria of SECTION 26 42 14.00 10 Page 6

protection as specified. Insulators are required wheneve